Linux伺服器釋放記憶體指令碼
阿新 • • 發佈:2018-11-10
1)在root目錄下建立一個freemem.sh的指令碼:
vi freemem.sh
#!/bin/bash used=`free -m | awk 'NR==2' | awk '{print $3}'` free=`free -m | awk 'NR==2' | awk '{print $4}'` echo "===========================" >> /var/log/mem.log date >> /var/log/mem.log echo "Memory usage | [Use:${used}MB][Free:${free}MB]" >> /var/log/mem.log if [ $free -le 100 ] ; then sync && echo 1 > /proc/sys/vm/drop_caches sync && echo 2 > /proc/sys/vm/drop_caches sync && echo 3 > /proc/sys/vm/drop_caches echo "OK" >> /var/log/mem.log else echo "Not required" >> /var/log/mem.log fi exit
2)加入Linux Crontab 定時任務:
echo "00 00 * * * root /root/freemem.sh" >> /etc/crondtab
經過測試,發現完全可行